This calculator outputs the how fast the Dodge Viper ACR can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size(345/30/20)

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OR

Tire Diameter(inches)

Final Drive Ratio

Redline (RPM)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

500

4.95

7.23

10.12

13.15

16.53

26.31

0

0

600

5.93

8.67

12.14

15.79

19.83

31.57

0

0

700

6.92

10.12

14.17

18.42

23.14

36.83

0

0

800

7.91

11.56

16.19

21.05

26.44

42.1

0

0

900

8.9

13.01

18.21

23.68

29.75

47.36

0

0

1000

9.89

14.46

20.24

26.31

33.05

52.62

0

0

1100

10.88

15.9

22.26

28.94

36.36

57.88

0

0

1200

11.87

17.35

24.29

31.57

39.66

63.14

0

0

1300

12.86

18.79

26.31

34.2

42.97

68.4

0

0

1400

13.85

20.24

28.33

36.83

46.27

73.67

0

0

1500

14.84

21.68

30.36

39.46

49.58

78.93

0

0

1600

15.83

23.13

32.38

42.1

52.88

84.19

0

0

1700

16.81

24.57

34.4

44.73

56.19

89.45

0

0

1800

17.8

26.02

36.43

47.36

59.49

94.71

0

0

1900

18.79

27.47

38.45

49.99

62.8

99.98

0

0

2000

19.78

28.91

40.48

52.62

66.1

105.24

0

0

2100

20.77

30.36

42.5

55.25

69.41

110.5

0

0

2200

21.76

31.8

44.52

57.88

72.71

115.76

0

0

2300

22.75

33.25

46.55

60.51

76.02

121.02

0

0

2400

23.74

34.69

48.57

63.14

79.32

126.29

0

0

2500

24.73

36.14

50.6

65.77

82.63

131.55

0

0

2600

25.72

37.58

52.62

68.4

85.94

136.81

0

0

2700

26.71

39.03

54.64

71.04

89.24

142.07

0

0

2800

27.69

40.48

56.67

73.67

92.55

147.33

0

0

2900

28.68

41.92

58.69

76.3

95.85

152.59

0

0

3000

29.67

43.37

60.71

78.93

99.16

157.86

0

0

3100

30.66

44.81

62.74

81.56

102.46

163.12

0

0

3200

31.65

46.26

64.76

84.19

105.77

168.38

0

0

3300

32.64

47.7

66.79

86.82

109.07

173.64

0

0

3400

33.63

49.15

68.81

89.45

112.38

178.9

0

0

3500

34.62

50.6

70.83

92.08

115.68

184.17

0

0

3600

35.61

52.04

72.86

94.71

118.99

189.43

0

0

3700

36.6

53.49

74.88

97.34

122.29

194.69

0

0

3800

37.58

54.93

76.9

99.98

125.6

199.95

0

0

3900

38.57

56.38

78.93

102.61

128.9

205.21

0

0

4000

39.56

57.82

80.95

105.24

132.21

210.48

0

0

4100

40.55

59.27

82.98

107.87

135.51

215.74

0

0

4200

41.54

60.71

85

110.5

138.82

221

0

0

4300

42.53

62.16

87.02

113.13

142.12

226.26

0

0

4400

43.52

63.61

89.05

115.76

145.43

231.52

0

0

4500

44.51

65.05

91.07

118.39

148.73

236.78

0

0

4600

45.5

66.5

93.09

121.02

152.04

242.05

0

0

4700

46.49

67.94

95.12

123.65

155.34

247.31

0

0

4800

47.48

69.39

97.14

126.29

158.65

252.57

0

0

4900

48.46

70.83

99.17

128.92

161.95

257.83

0

0

5000

49.45

72.28

101.19

131.55

165.26

263.09

0

0

5100

50.44

73.72

103.21

134.18

168.57

268.36

0

0

5200

51.43

75.17

105.24

136.81

171.87

273.62

0

0

5300

52.42

76.62

107.26

139.44

175.18

278.88

0

0

5400

53.41

78.06

109.29

142.07

178.48

284.14

0

0

5500

54.4

79.51

111.31

144.7

181.79

289.4

0

0

5600

55.39

80.95

113.33

147.33

185.09

294.67

0

0

5700

56.38

82.4

115.36

149.96

188.4

299.93

0

0

5800

57.37

83.84

117.38

152.59

191.7

305.19

0

0

5900

58.36

85.29

119.4

155.23

195.01

310.45

0

0

6000

59.34

86.73

121.43

157.86

198.31

315.71

0

0

6100

60.33

88.18

123.45

160.49

201.62

320.97

0

0

6200

61.32

89.63

125.48

163.12

204.92

326.24

0

0

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.